[Xen-changelog] [xen stable-4.7] fix out of bound access to mode_strings

[patchbot@xxxxxxx]

commit 01abcc0dc88d4e3db93334cd468c9363159b5d5f
Author:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
AuthorDate: Thu Dec 8 17:17:04 2016 -0800
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Fri Mar 17 12:06:57 2017 -0700

    fix out of bound access to mode_strings
    
    mode == ARRAY_SIZE(mode_strings) causes an out of bound access to
    the mode_strings array.
    
    Coverity-ID: 1381859
    
    Signed-off-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Reviewed-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/arch/arm/traps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index 5af964f..e2969aa 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -655,7 +655,7 @@ static const char *mode_string(uint32_t cpsr)
     };
     mode = cpsr & PSR_MODE_MASK;
 
-    if ( mode > ARRAY_SIZE(mode_strings) )
+    if ( mode >= ARRAY_SIZE(mode_strings) )
         return "Unknown";
     return mode_strings[mode] ? : "Unknown";
 }
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.7

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